Answer:
predation.
Explanation:
predation. means the preying of one animal on others
Answer:
Predation
Explanation:
Because one organism eats another. The PREDATOR benefits, the PREY is harmed.
Hope it helps!
How many protons, electrons, and neutrons does silver have
Answer:
Heat of vaporization: 250.580 kJ/mol. Number of Protons/Electrons: 47. Number of neutrons: 61. Classification: Transition Metal.
Number of Protons/Electrons: 47
Number of neutrons: 61
Classification: Transition Metal
Number of shells: 5
Explanation:
add 47 to 61 and its 108! hope its right! have a great day!
Please help help I need help ASAP What can you infer about the heartbeat when the pulse rate increases?
Answer:
The heart is pumping more blood throughout your body
Explanation:
How many moles of calcium are in 425 grams?
Answer:
10.6
Explanation:
10,604 in other words not in a decimal
There are 10.6 moles of calcium in 425 g of calcium.
Given to us is the mass of calcium which is 425 g, we also know the molar mass of the calcium which is 40.08 g/mol
To calculate the number of moles in a given mass of a substance, you need to divide the mass by the molar mass of the substance.
Using this information, we can calculate the number of moles of calcium in 425 grams:
Number of moles = Mass (g) / Molar mass (g/mol)
Number of moles = 425 g / 40.08 g/mol
Number of moles ≈ 10.61 mol
Therefore, there are approximately 10.61 moles of calcium in 425 grams.
Learn more about the mole concept here:
https://brainly.com/question/22540912
#SPJ 2
what is the mass of 6 moles of Fe2O3 plz help I been stuck on this for 3 days
Answer:
The molar mass of Fe2O3 is 159.7 g/mol.
A compound is made of 36.36% C, 7.13% H, 56.51% O. What is its empirical formula?
Its empirical formula : C₅H₁₂O₆
Further explanationThe empirical formula is the smallest comparison of atoms of compound forming elements.
(empirical formula) n = molecular formula
The principle of determining empirical formula and molecular formula
Determine the mass ratio of the constituent elements of the compound. Determine the mole ratio by dividing the elemental mass with the relative atomic mass obtained by the empirical formulaAr C = 12 g/mol
Ar H = 1 g/mol
Ar O = 16 g/mol
mol ratio of C : H : O =
[tex]\tt \dfrac{36.36}{12}\div \dfrac{7.13}{1}\div \dfrac{56.51}{16}\\\\3.03\div 7.13\div 3.53\rightarrow divided~by~smallest(3.03)\\\\1\div 2.4\div 1.2(\times 10)\rightarrow 5\div 12\div 6[/tex]
The default solution is water, describe the solution. What is the pH?
Which of the following is an oxidation-reduction reaction?
Answer:
last choice
Explanation:
oxidation and reduction can be defined in terms of adding or removing oxygen to a compound
oxidation is gaining oxygen
reduction is to loss oxygen
Please help. I'll give brainliest :)
Which answer describes a type of chemical weathering?
A. ice freezing in rock crevices
B. tafoni from salt crystallization
C. water changes rock crystals into hydrates
D. moving water over rock
Answer:
The answer is c, i just got it right on my test
Explanation:
stay safe!
pls pls answer questions for chem final within 45 mins i will give brainliest
Multiple choice- fill in the blank
Thermal energy is the (blank)
1. average kinetic energy of the particles in an object
2. total energy of the particles in an object
3. total transitional kinetic energy of the particles in an object
And internal energy is the (blank)
1. average kinetic energy of the particles in an object
2. total energy of the particles in an object
3. total transitional kinetic energy of the particles in an object
Answer:
Thermal energy refers to several distinct physical concepts, such as the internal energy of a system; heat or sensible heat, which are defined as types of energy transfer; or for the characteristic energy of a degree of freedom in a thermal system, where is temperature and is the Boltzmann constant
Explanation:
"Only recently have Answer
become the main energy source in the U.S."
are there any answer choices?
Is it easier to remove on electron from a sodium (Na) or aluminum (Al) atom? From Na+ or Al+? From Na2+ or Al2+?
Answer: It's easier for sodium to lose an electron because it has one valence electron whereas aluminum three valence electrons. It's easier for sodium in the other two examples as well because of the valance electrons and because it is very reactive with most elements because it really wants to get rid of the extra electron n the valance shell.
A student made copper sulfate using 0.250 moles of copper oxide and 0.500 moles of sulfuric acid.
Calculate the maximum mass of copper sulfate which could be produced.
Give your answer to 3 significant figures.
Relative formula mass (Mr) CuSO4 = 159.5 *
Answer:
39.9g is the maximum mass of copper sulfate which could be produced
Explanation:
1 mole of Copper oxide, CuO contains 1 mole of Cu
In the same way, 1 mole of sulfuric acid, H₂SO₄, contains 1 mole of sulfate ion, SO₄²⁻.
Thus we can understand that there are 0.250moles of Cu and 0.500 moles of SO₄²⁻ to produce CuSO₄.
The maximum moles that could be produced are 0.250 moles (Copper is limiting reactant).
To convert these moles to mass we use the relative formula mass:
0.250 moles CuSO₄ * (159.5g/mol) =
39.9g is the maximum mass of copper sulfate which could be producedWell can someone help me
Which drawing is a structural model of C3Hg?
Answer:
The correct option is C
Explanation:
The structural model of C₃H₈ is that of option C.
In Structural model which can also be known as structural formula, the atoms of a molecule or compound are identified by the location of chemical bonds that exists between them. A structural formula is seen to consist of symbols. In this case, the atoms are connected by short lines. These short lines actually represent their chemical bonds. Where one, two, or three lines that connect each element that make up the compound stands for single, double, or triple bonds, respectively.
Answer:
C
Explanation:
What is the mass of 7.00 moles of H2O2
Answer:
0.206 mol H₂O₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
7.00 moles H₂O₂
Step 2: Identify Conversions
Molar Mass of H - 1.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of H₂O₂ - 2(1.01) + 2(16.00) = 34.02 g/mol
Step 3: Convert
[tex]7.00 \ g \ H_2O_2(\frac{1 \ mol \ H_2O_2}{34.02 \ g \ H_2O_2} )[/tex] = 0.205761 mol H₂O₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
0.205761 mol H₂O₂ ≈ 0.206 mol H₂O₂
Answer:
238.14
Explanation:
2 H + 2O
2(1.01) + 2(16.00) = 34.02
34.02*7 = 238.14
238.14
How many protons are in gallium-68?
How many neutrons are in gallium-68?
What is the nuclear symbol of gallium-68?
Answer:
31 protons
37 Neutrons
^68 Ga
Explanation:
I don’t know the second part, but I’m guessing 37 because 37+31=68
What are the spectator ions in the equation below? Select all that apply.
Pb(NO3)2(aq) + H2SO4(aq) → PbSO4(s) + 2 HNO3(aq)
Answer:
H+ and NO3- ions
Explanation:
The Pb²+ ions react with the SO4²‐ ions to form a solid precipitate, i.e. they bond together and undergo a phase change;
On the contrary, the H+ and NO3- ions are aqueous ions before the reaction and the same after the reaction, i.e. they don't change;
Hence, the H+ and NO3- ions are spectator ions
The way to do this type of question is to consider what changes and what doesn't, look at phase changes and oxidation state changes
How can you increasethe concentration of a solution of a solid in water?a. By dividing the solution between two containersb. By evaporating some of the waterc. By adding water and Stirringd. By vigorously stirring alone
Answer:
By adding water stirring
Explanation:
In ionic bonding, atoms _____.
share electrons
are connected by strong electrical forces
lose protons and form ions
stop moving completely
Answer:
lose protons and form ions
Explanation:
I thjink hope this helps
PLease mark brainliest
Please Help Meeee.
Best answer will get brainliest.
Answer:Yes I am very good at acid
Explanation:
Answer: I say B
Explanation:
Which item is the weakest acid on the chart?
How are particle movement and heat related?
Question 4
Calculate the nlass of 7.1 x 1024 formula units of magnesium hydroxide, Mg(OH),.
its me again this is how you find the answer. note: i dont have the periodic table to see the exact atomic mass to find the molar mass however this is the answer:
so the actual formula is Mg(OH) with a 2 as a subscript because there are 2 Mg. so with Mg(OH)2 the Molar mass is 58.32g/mol. 58.32 g/mol x 7.1x1024 = 4.1x1026g
What element do you think would easily react with Calcium? Why?
Teresa has a $100 gift card to her favorite restaurant. Each day, she uses her gift card to buy the same lunch for $8.50. Colin has a $75 gift card to the same restaurant. His lunches cost $6 each. For what numbers of lunches will Teresa's gift card balance be greater than Colin's gift card balance?
Answer:
No
Explanation:
If Teresa has a $100 Gift Card and her lunch is $8.50 everyday, $8.50 x 10 = 10 Lunchs for a total of $85 then add one more which = 11 Lunchs for a total of 93.50, this means she can not buy another lunch, Colin has a $75 gift card and his lunch is $6 everyday, so $6 x 10 = $60 for a total of 10 lunchs plus add 2 which is 12 lunchs for a total of $72 which means No Teresa's Gift Card Will Not Be Greater In Lunchs.
If an unknown substance burns yellow, what metal ion is in the substance?
Answer:
Sodium (Element Symbol : Na)
Explanation:
Scientist identify a substance based off the color it burns. Sodium is identified as a yellow flame
Hope this helps! :)
Answer: Sodium, Na +
how much force in needed to accelerate 66 kg skier at 2 m/sec?
Answer:
132 Newtons
Explanation:
Force is mass times acceleration, so just multiply the numbers together. With the specified units for mass and acceleration the force will be in Newtons.
Hope this helps :)
Is it a model answer key
Answer:
is what a model answer key
I am going to go with yes. Imao
which of the following elements is a metalloid
Traditionally they include boron from group 3A, silicon and germanium in group 4A, aresnic and antimony in group 5A and tellurium from group 6A, although sometimes selenium, astatine, polonium and even bismuth have also been considered as metalloids. Typically metalloids are brittle and show a semi-metallic luster.
The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. Five elements are less frequently so classified: carbon, aluminium, selenium, polonium, and astatine.